...
- clientId: <not required>
- taskId: Id obtained by calling method #createTask
- workflowId: Id of workflow to run by task.
- startTime: <not required>
- timeZero: <not required>
- endTime: <not required>
- coldStateId: <not implemented>
- userId: Id of user running task.
- scenarioId: Id of what-if scenario.
- description: Description
- returns: TaskRun id
...